Fig. 2From: Long-term effects of early antibiotic intervention on blood parameters, apparent nutrient digestibility, and fecal microbial fermentation profile in pigs with different dietary protein levelsEffects of EAI on amines concentrations in the feces of pigs with different CP levels diets. (Con-LP, ; Ant-LP, ; Con-NP, ; Ant-NP, ). a On d 77. b On d 185. EAI: early antibiotic intervention. The commercial creep feed with or without in-feed antibiotics (50Â mg/kg olaquindox, 50Â mg/kg oxytetracycline calcium, and 50Â mg/kg kitasamycin) was fed to pig from d 7 to d 42. Thereafter, the control and antibiotic group were further randomly assigned to provide a normal (20%, 18%, 14% CP from d 42 to d 77, d 77 to d 120, d 120 to d 185, respectively) or low CP diet (16, 14, 10% CP from d 42 to d 77, d 77 to d 120, d 120 to d 185, respectively), respectively. The P values indicate main effects for antibiotic (A), protein level (C) and their interaction (AC), respectivelyBack to article page